heater core bypass

May 20, 2011

4

0

Description:
A/C not cold enough for you? Try this out. You can use a valve like I did, or put in a plug/cap to stop hot coolant flow to the heater core. It will help.

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Here I've clamped the heater core hoses, wrapped my a/c line in a towel (to prevent me accidentally cutting it), placed a towel below and cut the hoses. Valve is partially installed.

Here I've clamped the heater core hoses, wrapped my a/c line in a towel (to prevent me accidentally cutting it), placed a towel below and cut the hoses. Valve is partially installed.

0 2011/05/20 06:18:39 davb673

A closer shot of the valve partially installed. Make sure you get the flow right if you install a valve, or the heat won't work when you want it to...

A closer shot of the valve partially installed. Make sure you get the flow right if you install a valve, or the heat won't work when you want it to...

0 2011/05/20 06:18:39 davb673

At last, the Four Seasons p/n 74809 installed in my truck. You don't have to get a valve like this; it was what I could find that fit. Neither Lowe's or Home Depot had the right size plug for the heater hoses, so I went this route. I did have to tie wrap the vacuum valve closed for it to shut off coolant flow.

At last, the Four Seasons p/n 74809 installed in my truck. You don't have to get a valve like this; it was what I could find that fit. Neither Lowe's or Home Depot had the right size plug for the heater hoses, so I went this route. I did have to tie wrap the vacuum valve closed for it to shut off coolant flow.

0 2011/05/20 06:18:39 davb673

Here it is installed, with the tie wrap in place. I do cut the tie wrap sometime in the fall, as it starts getting cooler. One thing you'll notice with this mod, vent air is noticeably cooler also.

Here it is installed, with the tie wrap in place. I do cut the tie wrap sometime in the fall, as it starts getting cooler. One thing you'll notice with this mod, vent air is noticeably cooler also.

0 2011/05/20 06:21:20 davb673